Improvement in rocking-chairs



J. W. H1B/[BURGERl K Rookingnghair.

Patented Fe|e.1s,1879.

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,Wmfme UNITED STATES PATENT GEEIoE.,`

JOSEPH W. HAMBURGER, OF NEW YORK, N. Y.

IMPROVEMENT IN ROCKING-CHAIRS.

Speeicationvforming part of Letters Patent No. 212,461, dated February 18, 1879; application led January 10, 1879.

To all whom it may concern:

Beitknown thatI, J osEPE W. HAMBURGER, of the city, county, and State of New York, have invented a new and useful Improvement in Rockin g-Ghairs, which invention is fully set forth in the following specification, reference being had to the accompanying' drawings, in whichv Figure l represents a side view of aportion of a chair containing my improvement. Fig. 2 is a vertical cross-section thereof in the line m a', Fig. l.

Similar letters indicate corresponding parts.

My invention relates to stops for that class of chairs consistingof a spring-connected rocking-frame and base-frame 5 and it consists in combining with said frames two slotted arms, which are pivoted to the rocking frame on opposite sides of its centerl and cross each other, and a guide-pin common to both arms, attached to the base-frame in its center, so that when the rocking frame is actuated the two arms move lengthwise on the guide-pin, being permitted to assume any position by their pivots, one of the arms having the effect of checking a back mot-ion and the other a forward motion of the rocking frame, and both arms, combined with the action of the spring, having a tendency to bring said frame to a central position.

In the drawings, the letter A designates a portion of the rocking frame, and B is a portion of the base-frame ot a rockin g-chair, these frames being connected together by a spring, O, hung on pins a a, which are situated in the `central portions of the frames. D E are'two slotted arms, and G is a guide-pin, applied to the frames according to my invention.

The arms E E are pivoted to the rocking frame A on opposite sides of its center, as at b b, and they cross each other, while they are both fitted on the guide-pin G, which pin is arranged in the center of the base.

I cast the guide-pin G and one of the pins a a on a plate, H, secured to the base-frame B, and prefer to cover'the guide-pin with india-rubber, the other of the pins a a being cast on a plate, I, secured to therocking frame, which plate also supports the pivots b b.

The plate H has a plain face, so that the arms are situated in a corresponding plane at their pivotal points, and in order that the arms may clear each other at their point of intersection one of them is bent, as at c.

When the frame A is rocked the arms D E both move lengthwise on the guide-pin G, being permitted to assume any position by rea-- son ot'A their pivotal connections, one arm, however, movin g a less distance than the other in either the forward or back motion of said frame, one of which motions is regulated by the arm D and the other by the 'arm E and when said frame A is allowed to follow the action of the spring (1 -namely, when the chair is vacatedthe same is brought'to a central position by reason of the peculiar ar rangement of the pivots b b and the guide-pin G of the slotted arms. f

/Vhat I claim as new, and desire to secure by Letters 'Pa-tent, is-

The combination, with the spring-connected rocking frame and base-frame of a rockingchair, of the slotted arms D E, pivoted to the rocking frame on opposite sides of its center, and crossing each other, and the guidepin G,

common to both arms, fastened to the baseframe in its center, allconstructed and adapted to operate substantially as hereinbefore described.

In testimony that I claim. the foregoing I have hereunto set my hand and seal this 30th day of December, 18,78.

JOSEPH W. HAMBURGER. [L. s.]

Vitnesses:

W. HAUFF, E. F. KASTENHUBER. 

